Full text loading...
-
Increasing Confidence in Reef Interpretation Using DIP Angle Gathers Analysis
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Geomodel 2018, Sep 2018, Volume 2018, p.1 - 6
Abstract
The uncertainty associated with the seismic interpretation of carbonate reef boundaries primarily relates to the generally limited difference between the velocities characterizing the reef body, and those of the encasing strata. In addition, the carbonate overburden section also generates strong multiple waves, whose physical characteristics are similar to those of the primary reflections, hindering the unequivocal identification of the latter. As a result, through conventional processing, it is often difficult to achieve a high signal-to-noise ratio and to confidently define the reef boundaries. Even employing industry-established, traditional, seismic attributes a reef may just appear as a faint shadow or even not be visible. For a more confident interpretation of the reef we propose the adoption of an advanced methodology, based on analysis of dip angle gathers. Such an approach allows a straightforward and reliable identification of the reef edges, reducing the uncertainties connected with their interpretation and possibly highlighting areas of different reservoir properties.